code: def zsrc(self, val):
      self["zsrc"] = val
  
file_path: catboost/contrib/python/plotly/py2/plotly/graph_objs/streamtube/_starts.py
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 12 for calling the Starts obj's underlying member method code with example usage: obj.zsrc(val) without return types